That guy will be f*cked up in the end and die later on. Smh...
Wait, who's body would they use to switch with. You can't use a dead body.
Most likely, they're waiting on someone who donated their whole body to science. Obviously they can't use a dead body or kill someone, so odds are, there is a donor who is currently in a vegetable state, meaning their brain went on lockdown mode, but odds are, their body is still healthy and functional, awaiting for commands from the brain that probably will never function again. As such, the day they decide to pull the plug will be the day the body is moved to the designated location for surgery, still on life support, and ultimate death will be decapitation, not via pulling the plug as the body needs to remain fresh and alive up till the very last second.